To play a Rovio game, our terms of service state that a player should be a minimum age of 13. The ratings of our games in app stores may have a lower age suitability than this for titles as they are made independently from Rovio by the responsible body in the app stores. It is good to note that these ratings refer to the content of the game, much like the rating you may see for a movie or a music album. If you would like to understand more about this, you can read more about it under the app store guidance for Apple, Google and Windows 10 here
As a responsible game developer, Rovio has applied a minimum age of 13 to its games in our Terms of Service for a variety of reasons including the existence of in-game group chat in many of our titles, as well as the ability to make in-app purchases in our titles and our considerations towards player privacy.